startActivityForResult is deprecated

I have this blocks of codes from the a class, which is extended by ActivityX. I have two startActivityForResult need to be fixed and I dont know how to implement the new API.

This is the 1st startActivityForResult.

    private void launchIntentToAddPackToSpecificPackage(String identifier, String stickerPackName, String whatsappPackageName) {
        Intent intent = createIntentToAddStickerPack(identifier, stickerPackName);
        intent.setPackage(whatsappPackageName);
        try {
            startActivityForResult(intent, ADD_PACK);

        } catch (ActivityNotFoundException e) {
            Toast.makeText(this, R.string.add_pack_fail_prompt_update_whatsapp, Toast.LENGTH_LONG).show();
        }
    }

This is the 2nd startActivityForResult.

    //Handle cases either of WhatsApp are set as default app to handle this intent. We still want users to see both options.
    private void launchIntentToAddPackToChooser(String identifier, String stickerPackName) {
        Intent intent = createIntentToAddStickerPack(identifier, stickerPackName);
        try {
            startActivityForResult(Intent.createChooser(intent, getString(R.string.add_to_whatsapp)), ADD_PACK);
        } catch (ActivityNotFoundException e) {
            Toast.makeText(this, R.string.add_pack_fail_prompt_update_whatsapp, Toast.LENGTH_LONG).show();
        }
    }

This is the OnActivityResult.

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == ADD_PACK) {
            if (resultCode == Activity.RESULT_CANCELED) {
                if (data != null) {
                    final String validationError = data.getStringExtra("validation_error");
                    if (validationError != null) {
                        if (BuildConfig.DEBUG) {
                            //validation error should be shown to developer only, not users.
                            MessageDialogFragment.newInstance(R.string.title_validation_error, validationError).show(getSupportFragmentManager(), "validation error");
                        }
                        Log.e(TAG, "Validation failed:" + validationError);
                    }
                } else {
                    new StickerPackNotAddedMessageFragment().show(getSupportFragmentManager(), "sticker_pack_not_added");
                }
            }
        }
    }